Complete the following achievements to unlock Microsoft Gamerscore points.

There Is Only War (25 points): Terminate 500 Enemy Targets.
Death from Above (10 points): Kill 20 enemies using Assault Jump.
Sweeping Advance (10 points): Kill an enemy who is retreating.
Emperor's Champion (10 points): Kill a boss using only your Force Commander.
Lightning Assassin (10 points): Kill a boss in less than one minute.
Welcome to Calderis (15 points): Complete "Stand With Your Brothers" and "Retake the Hamlet."
Rant All You Will (30 points): Complete "The True Enemy."
The Cleansing Begins (30 points): Complete "The Defense of Argus Gate."
Astronomical! (30 points): Recover the data from the Astronomic Array.
Even In Death I Still Serve (30 points): Complete "Into the Hive."
Heroes of Angel Gate (30 points): Complete "Secrets of Angel Forge."
Fight to Survive (40 points): Complete Campaign on Recruit difficulty.
Hold back the Xenos (40 points): Complete Campaign on Sergeant difficulty.
Win the War (40 points): Complete Campaign on Captain difficulty.
Allies to the Cause (10 points): Complete a mission in co-op mode.
Allies to the Chapter (25 points): Complete 15 missions in co-op.
Battle Brothers (50 points): Complete the Campaign in Co-op.
Dug In (10 points): Successfully defend 5 Strategic Assets.
Massacre (10 points): Complete 10 missions in a row without failing.
Not one inch (10 points): Defend a province without losing a single generator.
That's Close Enough (10 points): Complete a mission with only ranged weapons.
Rush 'em (10 points): Complete a mission under five minutes.
Purge the Xenos (10 points): Earn a 5 star Fury rating.
Feel No Pain (10 points): Earn a 5 star Resilience rating.
Fleet of Foot (10 points): Earn a 5 star Speed rating.
The Book of Honor (10 points): Get 15 stars on one mission.
Fast Attack (15 points): Gain a second deployment in a single day.
Tireless warrior (15 points): Gain a third deployment in a single day.
Hero of the Imperium (25 points): Attain a Campaign Score of over 30,000 points. Earnable in Single Player and by the host in Co-Op.
Legend (25 points): Attain a Campaign Score of over 90,000 points. Earnable in Single Player and by the host in Co-Op.
In the name of the Emperor (20 points): Own all Strategic Assets in a Campaign. Earnable only in Single Player and by the host in Co-Op.
Elite (10 points): Max out a Combat Discipline on a squad. Earnable in Single Player and by the host in Co-Op.
Heavy Support (10 points): Reach Level 20 with one of your Squads. Earnable in Single Player and by the host in Co-Op.
Elite Strike Force (10 points): Create a 3 Player Party and Play a Ranked Multiplayer Game together.
Gladiator (25 points): Play 10 Ranked Multiplayer Games.
Wisdom of the Ancients (10 points): View a recorded game.
Veteran Victor (30 points): 100 ranked wins.
Aspect Warrior (20 points): 20 online ranked games completed with Eldar.
Angel of Death (20 points): 20 online ranked games played with Space Marines.
A proper Waaagh! (20 points): 20 online ranked games completed with Orks.
Great Devourer (20 points): 20 online ranked games completed with Tyranid.
Hail the Champion (25 points): Earn Champion rating 20 times during online ranked play.
Master of the Apothecarion (30 points): Revive your teammates 50 times during online ranked play.
Winning rush (20 points): Earn a 5 game Win streak during online ranked play.
Flawless victory (20 points): Achieve an online ranked victory with 500 victory points remaining.
Red Ones Go Fastah! (5 points): Create a Customized look for any race in the Army Painter.
Crush the Enemy (40 points): Complete Campaign on Primarch difficulty.
The Warboss (30 points): Complete "Raid Against the Warboss."
The Avatar of Khaine (30 points): Complete "The Wailing Doom."